EP0848405A3 - Low power impregnated cathode of cathode-ray tube - Google Patents

Low power impregnated cathode of cathode-ray tube Download PDF

Info

Publication number
EP0848405A3
EP0848405A3 EP97309981A EP97309981A EP0848405A3 EP 0848405 A3 EP0848405 A3 EP 0848405A3 EP 97309981 A EP97309981 A EP 97309981A EP 97309981 A EP97309981 A EP 97309981A EP 0848405 A3 EP0848405 A3 EP 0848405A3
Authority
EP
European Patent Office
Prior art keywords
cathode
low power
ray tube
power impregnated
pellet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97309981A
Other languages
German (de)
French (fr)
Other versions
EP0848405A2 (en
EP0848405B1 (en
Inventor
John Hwan Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP0848405A2 publication Critical patent/EP0848405A2/en
Publication of EP0848405A3 publication Critical patent/EP0848405A3/en
Application granted granted Critical
Publication of EP0848405B1 publication Critical patent/EP0848405B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/04—Cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/26—Supports for the emissive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/28—Dispenser-type cathodes, e.g. L-cathode

Abstract

A low power impregnated cathode consists of a pellet (30), a cup (12), an inner sleeve (10), a tap (3), and an outer sleeve (20), the diameter (D) of the pellet is less than at least one and half times of the thickness (H) of the pellet; The outer diameter of the bottom part (24) of the outer sleeve (20) is larger than an outer diameter of the top part (22) thereof.
EP97309981A 1996-12-11 1997-12-11 Low power impregnated cathode of cathode-ray tube Expired - Lifetime EP0848405B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR6416296 1996-12-11
KR1019960064162A KR100236006B1 (en) 1996-12-11 1996-12-11 Cathode-ray tube

Publications (3)

Publication Number Publication Date
EP0848405A2 EP0848405A2 (en) 1998-06-17
EP0848405A3 true EP0848405A3 (en) 1998-08-05
EP0848405B1 EP0848405B1 (en) 2004-03-10

Family

ID=19487138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97309981A Expired - Lifetime EP0848405B1 (en) 1996-12-11 1997-12-11 Low power impregnated cathode of cathode-ray tube

Country Status (6)

Country Link
US (1) US6016026A (en)
EP (1) EP0848405B1 (en)
JP (1) JPH10208617A (en)
KR (1) KR100236006B1 (en)
CN (1) CN1092837C (en)
ID (1) ID18863A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11329210A (en) * 1998-05-08 1999-11-30 Sony Corp Electron gun
KR100759539B1 (en) * 2001-03-17 2007-09-18 삼성에스디아이 주식회사 Cathode assembly for electron gun
FR2833406A1 (en) * 2001-12-10 2003-06-13 Thomson Licensing Sa VACUUM TUBE CATHODE WITH IMPROVED LIFETIME
KR100442300B1 (en) 2002-01-04 2004-07-30 엘지.필립스디스플레이(주) Cathode for Cathode Ray Tube
JP2004288390A (en) * 2003-03-19 2004-10-14 Hitachi Displays Ltd Cathode-ray tube
JP2008523556A (en) * 2004-12-09 2008-07-03 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Electron emission cathode
CN108878232B (en) * 2018-07-04 2021-04-06 中国科学院电子学研究所 Hot cathode assembly for vacuum electronic devices

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1002088B (en) * 1955-07-06 1957-02-07 Siemens Ag Indirectly heated storage cathode with a storage container and a radiation protection jacket surrounding this and the heater and simultaneously serving to hold the cathode
DE1764047A1 (en) * 1968-03-26 1971-04-15 Telefunken Patent Cathode arrangement for an electron beam generating system of a cathode ray tube
US4184100A (en) * 1977-03-29 1980-01-15 Tokyo Shibaura Electric Co., Ltd. Indirectly-heated cathode device for electron tubes
JPS6062034A (en) * 1983-09-14 1985-04-10 Hitachi Ltd Hot-cathode frame body
EP0436360A2 (en) * 1989-12-31 1991-07-10 Samsung Display Devices Co., Ltd. Dispenser cathode structure for use in electron gun
US5218263A (en) * 1990-09-06 1993-06-08 Ceradyne, Inc. High thermal efficiency dispenser-cathode and method of manufacture therefor
EP0616353A2 (en) * 1993-03-17 1994-09-21 Kabushiki Kaisha Toshiba Cathode assembly and method of manufacturing the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69204956T2 (en) * 1991-09-18 1996-05-02 Nec Corp Impregnated cathode and process for its manufacture.
KR0138280B1 (en) * 1995-03-15 1998-04-28 윤종용 Electron gun for cathode ray tube

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1002088B (en) * 1955-07-06 1957-02-07 Siemens Ag Indirectly heated storage cathode with a storage container and a radiation protection jacket surrounding this and the heater and simultaneously serving to hold the cathode
DE1764047A1 (en) * 1968-03-26 1971-04-15 Telefunken Patent Cathode arrangement for an electron beam generating system of a cathode ray tube
US4184100A (en) * 1977-03-29 1980-01-15 Tokyo Shibaura Electric Co., Ltd. Indirectly-heated cathode device for electron tubes
JPS6062034A (en) * 1983-09-14 1985-04-10 Hitachi Ltd Hot-cathode frame body
EP0436360A2 (en) * 1989-12-31 1991-07-10 Samsung Display Devices Co., Ltd. Dispenser cathode structure for use in electron gun
US5218263A (en) * 1990-09-06 1993-06-08 Ceradyne, Inc. High thermal efficiency dispenser-cathode and method of manufacture therefor
EP0616353A2 (en) * 1993-03-17 1994-09-21 Kabushiki Kaisha Toshiba Cathode assembly and method of manufacturing the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 193 (E - 334) 9 August 1985 (1985-08-09) *

Also Published As

Publication number Publication date
CN1092837C (en) 2002-10-16
KR19980045917A (en) 1998-09-15
EP0848405A2 (en) 1998-06-17
EP0848405B1 (en) 2004-03-10
KR100236006B1 (en) 1999-12-15
JPH10208617A (en) 1998-08-07
CN1185649A (en) 1998-06-24
ID18863A (en) 1998-05-14
US6016026A (en) 2000-01-18

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